Insulating device



FIG. 1 is a top, front, right perspective view of an insulating device showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof; and,

FIG. 4 is a right side view thereof.

The broken lines immediately adjacent to the shaded area represent unclaimed boundaries of the design. The broken lines showing the remainder of the insulating device represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for an insulating device, as shown and described. 